#3963CF#3963CF

#3963CF is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.1% C 0.174 H 265.0°. Best body text is #FFFFFF at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#3963CF
RGB	rgb(57, 99, 207)
HSL	hsl(223, 61%, 52%)
HSV	hsv(223, 72%, 81%)
CMYK	cmyk(72.5%, 52.2%, 0%, 18.8%)
CIE-LAB	lab(44.66, 22.50, -60.17)
CIE-LCH	lch(44.66, 64.24, 290.50°)
OKLab	oklab(53.09% -0.0152 -0.1731)
OKLCH	oklch(53.09% 0.174 265)
XYZ	xyz(17.4077, 14.2967, 60.8615)
Luminance	0.1430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963CF #CFA539

analogous

#39AECF #3963CF #5A39CF

triadic

#3963CF #CF3963 #63CF39

tetradic

#3963CF #CF39AE #CFA539 #39CF5A

square

#3963CF #CF39AE #CFA539 #39CF5A

split-complementary

#3963CF #CF5A39 #AECF39

monochromatic

#1C3472 #284AA3 #3963CF #6A8ADB #9CB1E7

Accessibility & contrast

On white

5.44

#3963CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.86

#3963CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963CF

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963CF	#FFFFFF	#000000	##FFFFFF
##3963CF	1.00	5.44	3.86	5.44
#FFFFFF	5.44	1.00	21.00	1.00
#000000	3.86	21.00	1.00	21.00
##FFFFFF	5.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1971D3

Deuteranopia (green-blind)

#0063CD

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3963cf;
/* rgb */ color: rgb(57, 99, 207);
/* oklch */ color: oklch(53.1% 0.174 265.0);

Tailwind

colors: {
  custom: {
    50: '#838ede',
    500: '#3963cf',
    950: '#000000',
  },
}

SCSS

$custom: #3963cf;
$custom-light: #838ede;
$custom-dark: #000000;

JSON

{
  "hex": "#3963cf",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 207
  },
  "hsl": {
    "h": 223.2,
    "s": 60.976,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53092,
    "c": 0.17379,
    "h": 265
  },
  "luminance": 0.14299
}

Semantic roles & 50–950 ramp

primary

#3963CF

secondary

#D3C091

accent

#B744E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3963CF

Body copy rendered with the generated semantic roles for this colour.

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